Display Device Insulating Layer Opening Pattern Gas Discharge
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Solution Overview
Problem
Display devices face issues with the generation of gas due to chemical decomposition of organic matter in insulating layers, which can damage light emitting elements and reduce display quality and durability.
Innovation Solution
A display device design that includes a substrate with a display area and a peripheral area, featuring a first wiring in the peripheral area, an insulating layer covering the first wiring, a second wiring with an opening pattern exposing the insulating layer, and a cladding film and cladding part that cover the second wiring and insulating layer, respectively, to prevent gas buildup and enhance durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an insulating layer is used to insulate between stacked conductive layers, then insulation is achieved, but gas is generated due to chemical decomposition of organic matter
Solution Approach 1:
The patent introduces opening patterns in the insulating layer that allow gas generated from chemical decomposition to escape. This converts the harmful gas generation into a controlled process where the gas is discharged through predetermined paths, preventing film lifting and damage to light emitting elements while maintaining the insulation function.
2Reliability
If a cladding film is added to cover the second wiring, then protection is improved, but device complexity increases
Solution Approach 1:
The cladding film is selectively applied only in regions where it is most needed - specifically covering the second wiring and extending into the opening patterns. This localized approach provides protection against film lifting and etchant penetration at critical interfaces while avoiding unnecessary complexity in areas where protection is not required.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The proposed solution effectively reduces or prevents the film lifting phenomenon and penetration of etchants, thereby improving the display quality and durability of the display device by ensuring proper discharge of gas generated from the insulating layer.
Implementation Method 1
Due to short-term or long-term chemical decomposition of organic matter contained in the insulating layer, the insulating layer may generate gas
Data Source
AI summary
A display device includes: a substrate having a display area and a peripheral area adjacent to the display area; a first wiring in the peripheral area on the substrate; an insulating layer on the first wiring and covering at least a portion of the first wiring; a second wiring on the insulating layer, overlapping at least a portion of the insulating layer in a plan view, and having an opening pattern exposing at least a portion of the insulating layer; a first cladding part on the insulating layer and the second wiring to fill the opening pattern and exposing at least a portion of the second wiring; and a second cladding part on the second wiring and covering at least a portion of the second wiring exposed from the first cladding part.